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https://github.com/OSGeo/PROJ/pull/2536 changed the name of the
ellps=intl to "International 1924 (Hayford 1909, 1910)"
When writing a GeoTIFF file from GDAL using a SRS built from a
PROJ string, GDAL massages the datum name to
"Unknown_based_on_International_1924_Hayford_1909_1910_ellipsoid"
Before this fix, this wasn't considered as equivaleent to the non-massaged
datum name "Unknown based on International 1924 (Hayford 1909, 1910) ellipsoid"
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- C API: PJ_GUESSED_WKT2_2019 is added, PJ_GUESSED_WKT2_2018 aliased to it
- C API: PJ_WKT2_2019[_SIMPLIFIED] is added, PJ_WKT2_2018[_SIMPLIFIED] alias to it
- C++ API: similarly for WKTFormatter::Convention::WKT2_2019[_SIMPLIFIED]
Those above changes should be fully backward API and ABI compatible.
projinfo changes:
- accept WKT2_2019 as value for -o switch. WKT2_2018 is still accepted (undocumented)
- output now uses 'WKT2_2019 string:', so might break scripts that would rely on that.
Other internal code references to WKT2_2018 changes to WKT2_2019, included
in tests.
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This work mostly consists of:
- a C++ implementation of the ISO-19111:2018 / OGC Topic 2
"Referencing by coordinates" classes to represent Datums,
Coordinate systems, CRSs (Coordinate Reference Systems) and
Coordinate Operations.
- methods to convert between this C++ modeling and WKT1, WKT2
and PROJ string representations of those objects
- management and query of a SQLite3 database of CRS and Coordinate Operation definition
- a C API binding part of those capabilities
This is all-in-one squashed commit of the work of
https://github.com/OSGeo/proj.4/pull/1040
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